Cylindrical battery

Abstract

The present invention provides a cylindrical battery in which the opening end of an outer can has a different polarity from a sealing body and is easily connectable to an external lead. A cylindrical battery that is one embodiment described in the present disclosure comprises: an electrode body that includes a positive electrode and a negative electrode; a bottomed cylindrical outer can that houses the electrode body and is connected to one of the positive electrode and the negative electrode; and a sealing body that is connected to the other of the positive electrode and the negative electrode. The outer can has a protrusion formed by the side surface thereof protruding radially inward, and an opening end extends radially outward. The sealing body is fixed by crimping radially inward of the protrusion with a gasket interposed therebetween.

1 . A cylindrical battery, comprising:
 an electrode assembly including a positive electrode and a negative electrode;   a bottomed cylindrical outer can which houses the electrode assembly and which is connected to one of the positive electrode and the negative electrode; and   a sealing assembly connected to the other one of the positive electrode and the negative electrode, wherein   the outer can has a projection where a side surface projects radially inward, and an opening end portion extending radially outward, and   the sealing assembly is fixed by being crimped radially inward by the projection via a gasket.   
     
     
         2 . The cylindrical battery according to  claim 1 , wherein the opening end portion is formed along an entire periphery of the outer can. 
     
     
         3 . The cylindrical battery according to  claim 1 , wherein the opening end portion is formed in a single or plural number in part along the circumferential direction of the outer can. 
     
     
         4 . The cylindrical battery according to  claim 1 , further comprising a conductive member joined to the opening end portion.